Level limit switchSeries VN 1000 / 2000 / 5000 / 6000Technical information / Instruction manual
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Page
Safety notes/ Technical support 2
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Introduction 3
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Technical data 4
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Approvals 12
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Options 13
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Mounting 14
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Electrical installation 18
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Signal output/ Diagnostics 24
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Settings Sensitivity 29
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Maintenance 30 ---------------------------------------------------------------------------------------------------------
Notes for use in Hazardous Locations 31
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Assembly VN ..040 34
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Assembly VN ..020/ VN ..030 with separate housing 39
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Disposal 41
Table of contents
Subject to technical change and price change.
We assume no liability for typing errors.
All dimensions in mm (inches). Different variations to those specified are possible.Please contact our technical consultants.
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Safety notes / Technical support
Notes • Installation, maintenance and commissioning must be carried out only by qualified technical personnel. • The product must be used only in the manner outlined in this instruction manual.
Special attention must be paid to warnings and notes as follows:
WARNING
Relates to a caution symbol on the product and means, that a failure to observe the necessary precautions can result in death, serious injury and/ or considerable material damage.
WARNING
Relates to a caution symbol on the product and means, that a failure to observe the necessary precautions can result in death, serious injury and/ or considerable material damage.
This symbol is used, when there is no corresponding caution symbol on the product.
A failure to observe the necessary precautions can result in considerable material damage.
CAUTION
Safety symbols
In manual and on product
Description
CAUTION: refer to accompanying documents (manual) for details.
Earth (ground) Terminal
Protective Conductor Terminal
Technical support
Please contact your local supplier (see www.uwt.de for address). Otherwise you can contact:
UWT GmbH Tel. 0049 (0)831 57123-0Westendstr. 5 Fax. 0049 (0)831 7687987488 Betzigau [email protected] www.uwt.de
WARNING
Relates to a caution symbol on the product: Risk of electric shock
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Introduction
Applications
The device is used for level monitoring in all types of containers and silos. It can be used with all powdery and granulated bulk materials that do not show a strong tendency to form crusts or deposits. Detection of solids in water is also possible.
The units can be delivered with a wide range of Ex-approvals for use in Gas and Dust Hazardous Areas.
A selection of fields of application:
• Building materials industry lime, styrofoam, moulding sand, etc.
• Food industry milk powder, flour, salt, etc.
• Plastics industry plastics granules etc.
• Timber industry • Chemical industry• Mechanical engineering
The VIBRANIVO oscillating probe is normally screwed into the lateral container wall so that it is level with the filling height to be registered and monitored.
The device can also be mounted from the top of the container. In this case an extension piece is used to mount the probe level with the height to be registered.
The length of the probe can be up to 4 m (157”) with an extension tube (VN ..030) or up to 20 m (787”) with an extension rope (VN 2050/ 6050).
The use of a sliding sleeve is recommended so that the switch point can be changed easily during operation of the device.
Function
The piezo-electrically stimulated oscillating fork vibrates at its mechanical resonance frequency. If the probe is covered by the bulk material, the damping thus generated is registered electronically and a corresponding signal output is actuated.The oscillation of the fork ensures a certain self-cleaning.
Detection of solids Detection of solids in water
Application in down pipe
Application in down pipe
optional sliding sleeve
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VN 1030VN 5030
VN ..050
VN ..030VN ..040
VN ..020VN ..030VN ..040
VN ..020
VN ..020
VN 1020VN 1030
VN 5020VN 5030
VN 1020VN 5020
VN 1020VN 5020
Level limit switchSeries VN 1000 / 2000 / 5000 / 6000Technical information / Instruction manual
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Technical data
Housing versions
Series VN 1000/ 2000
Standard
Series VN 5000/ 6000
Standard
de
Explosionproof with increased safety terminal box
d
Flameproof/ explosionproof
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L
without option with option: enhanced sensitivity (pos.26 x)Vibrasil 70 (pos.26 a)Vibrasil 90 (pos.26 b)
VN 1020VN 5020
165 mm (6.5“)
VN 2020VN 6020
235 mm (9.25”) 260 mm (9.84“)
Extensions
Thread Flange Temperature extended shaft(pos.3 2)
Option: Separate housing(pos.26 1/ pos.26 2)
Thread Temperature extended shaft(pos.3 2)
Flange
Technical Data
Triclamp
Triclamp With option separate housing(pos.26 1/ pos.26 2)
Cap nut: see page 16
Cap nut: see page 15
* see page 6 bottom right** Welding seam max. ø43.8 mm (ø1.72")
* see page 6 below right hand** Welding seam max. ø43.8 mm (ø1.72")
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VN ..020
VN ..030
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Thread Flange
Extension tube NOT
part of delivery
* Length of oscillating rods
with option Enhanced sensitivity (pos.26 x)Vibrasil® 70 (pos.26 a)Vibrasil® 90 (pos.26 b)
Thread
Technical data
Flange
Triclamp
* see bottom right** Welding seam max. ø43.8 mm (ø1.72")
* see right** Welding seam max. ø43.8 mm (ø1.72")
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VN ..040
VN ..050
VN 10..0 VN 20..0VN 50..0 VN 60..0
Pos.5 A G 1"5 B NPT 1"
Pos.5 L G 1"5 M G 1"5 S NPT 1"5 T NPT 1"5 U NPT 1"G 1"
G 1"
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Technical data
Electrical dataConnection terminals max. 4 mm2 (AWG 12)
Cable entry M20 x 1.5 screwed cable glandNPT 1/2“ conduit connectionNPT 3/4” conduit connection (only VN 5000/ 6000)
Clamping range (diameter) of the factory provided cable glands:M20 x 1.5: 6 .. 12 mm (0.24 .. 0.47")
Signal delay Sensor free -> covered ca. 1 secSensor covered -> free ca. 1 .. 2 secOn the electronic module “Universal voltage Relay DPDT” is an electronic delay, adjustable up to 30 sec.
Safety operation (FSL,FSH) Switchable for minimum or maximum safety
Sensitivity Adjustable in 2 levels (A/ B)
Vibration frequency VN 1000/ 5000: ca. 350 HzVN 2000/ 6000: ca. 125 Hz ca. 90 Hz (enhanced sensitivity)
Installation category II
Pollution degree 2 (inside housing)
Electronic modules Universal voltageRelay SPDT(VN 1000/ 2000/ 5000/ 6000)
Universal voltageRelay DPDT(VN 1000/ 2000/ 5000/ 6000)
3-wire PNP
(VN 1000/ 2000/ 5000/ 6000)
Power supply 19 .. 230 V AC 50 - 60 Hz 19 .. 55 V DC +10%
19 .. 230 V AC 50 - 60 Hz 19 .. 55 V (36 V*) DC +10%* Version with intrinsic safe connection between Electronic module and Vibrating fork (see pos.4 in the selection list)
18 .. 50 V DC+10%
Max. ripple of power supply 7 Vss at DC 7 Vss at DC 7 Vss
Installed load max. 8 VA/ 1.5 W max. 18 VA/ 2 W max. 1.5 W
Signal output Floating relay SPDT
VN 1000/ 2000:AC max. 253 V, 4 A, 500 VAat cos Phi = 1DC max. 253 V, 4A, 60 W
VN 5000/ 6000:AC max. 250 V, 8 A non inductiveDC max. 30 V, 5 A non inductive
Floating relay DPDT
VN 1000/ 2000:AC max. 253V, 4 A, 500 VAat cos Phi = 1DC max. 253 V, 4 A, 60 W
VN 5000/ 6000:AC max. 250 V, 8 A non inductiveDC max. 30 V, 5 A non inductive
Open Collector:permanent load max. 0.4 Ashort-circuit and overload protectedturn-on voltage: max. 50 V (reverse protection)
Intrinsic safe ratings - - -
Indicating light Status of signal outputby built-in LED
Status of signal outputby built-in LED
Status of signal outputby built-in LED
Isolation Power supply to signal output: 2225 Vrms
Power supply to signal output: 2225 VrmsSignal output to signal output (DPDT): 2225 Vrms
-
Protection class I I III
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Technical data
Electronic modules 2-wirewithout contact(VN 1000/ 2000/5000/ 6000)
NAMUR IEC 60947-5-6(VN 2000/ 6000)
8/16 mA or 4-20 mA(VN 1000/ 2000/ 5000/ 6000)
8/16 mA (VN 1000/2000/ 5000/ 6000)
Power supply 19 .. 230 V 50/ 60 Hz/ DC +10%
ca. 7 .. 9 V DC(spec. IEC 60947-5-6)
Non intrinsic safe version:12.5 .. 36 V DC +0%Intrinsic safe version:12.5 .. 30V DC +0%
12.5 .. 36 V DC +0%
Max. ripple of power supply
7 Vss at DC - - -
Installed load max. 1.5 VA/ 1 W max. 30 mA (for non intrincic safe application)
max. 0.8 W max. 0.8 W
Signal output Load current: min. 10 mAmax. 500 mA permanent max. 2 A <200 msmax. 5 A <50 msVoltage drop on the electronic module: max. 7 V with closed electric circuit.
Cutoff current with open electric circuit: max. 5 mA.
To enable a safe opening of relay contacts, the cutoff current will be set for some milliseconds to 0, when opening the electric circuit.
Short-circuit- and overload-protected.
<1 mA or >2.2 mA(spec. IEC 60947-5-6)
Setting 8/16 mA: 8 mA or 16 mA ±0.5 mA.
Setting 4-20 mA: Output current depends on the vibration amplitude of the fork between 6 mA for damped vibration and20 mA for full vibration.Resolution is 0.1 mA.
8 mA or 16 mA ±1 mA
Intrinsic safe ratings - U i 20 VI i 67 mAP i 0.17 WC i negligible smallL i negligible small
Intrinsic safe version:
U i 30 VI i 130 mAP i 0.8 WC i negligible smallL i negligible small
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Indicating light Status of signal outputby built-in LED
Status of signal output anddiagnostics of vibrationby built-in LED
Status of signal output anddiagnostics of vibrationby built-in LED
Status of signal output by built-in LED
Protection class I III III III
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Mechanical data
Housing Aluminium housing, powder coated RAL 5010 gentian blueSeal between housing and lid: NBR Seal between housing and process connection: NBRNameplate: polyester film
Cable for separate housing Silicone elastomer, ø10 mm (ø0.39"), surface resistance <109 Ohm, UV-resistent, min. bending radius 50 mm (1.97")
Degree of protection VN 1000/ 2000: IP66*VN 5000/ 6000: NEMA Type 4X, IP66*
* IEC/ EN 60529
Process connection/ extension L
VN ..020/ ..030/ ..050: Stainless steel 1.4301 (304)* or 1.4404 (316L)VN ..40: Stainless steel 1.4305 (303)* or 1.4404 (316L)*Flanges 1.4541 (321)Extension cable VN ..050: PUR with carbon black (no food grade)Thread: R 11/2“ tapered EN 10226 or NPT 11/2“ tapered ANSI B 1.20.1Triclamp: Stainless steel 1.4301 (304) or 1.4404 (316L) 2" (DN50) ISO 2852Flanges according to selection
Oscillator Material: stainless steel 1.4404/ 1.4581 (316L) (food grade)Surface treatment of vibrating rods: polished, Ra ≤0.75 μm; teflon (on request)
Sound level max. 50 dBA
Overall weight(ca.)
.
Technical data
VN 1000/ 2000 Standardhousing
Extension
VN 1020/ 2020:1.6 kg
(3.5 lbs)-
VN 1030/ 2030:1.6 kg
(3.5 lbs)+2.5 kg/m
(+5.5 lbs per 39.3“)
VN 1040/ 2040:2.0 kg
(4.4 lbs)delivery without extension tube
VN 1050/ 2050: 4.0 kg(8.8 lbs)
+0.5 kg/m (+1.1 lbs per 39.3”)
VN 5000/ 6000 Standardhousing
de-housing d-housing Extension
VN 5020/ 6020:2.1 kg(46 lbs)
3.2 kg(7 lbs)
2.8 kg(6.2 lbs)
-
VN 5030/ 6030:2.1 kg
(4.6 lbs)3.2 kg(7 lbs)
2.8 kg(6.2 lbs)
+2.5 kg/m(+5.5 lbs per 39.3“)
VN 5040/ 6040:2.5 kg
(5.5 lbs)3.6 kg
(7.9 lbs)3.2 kg(7 lbs)
delivery without extension tube
VN 5050/ 6050: 4.5 kg(9.9 lbs)
5.6 kg(12.3 lbs)
5.2 kg(11.4 lbs)
+0.5 kg/m (+1.1 lbs per 39.3”)
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Technical data
Operating conditions
Ambient temp. (housing) -40°C .. +60°C (-40 .. +140°F) VN ..020/ VN ..030 and VN ..040 -25°C .. +60°C (-13 .. +140°F) VN ..050
Process temperature -40°C .. +150°C (-40 .. +302°F) VN ..020/ VN ..030 and VN ..040 Mounting for process temperature up to 150°C (302°F): see drawing-40°C .. +110°C (-40 .. +230°F) VN ..020/ VN ..030 with Ex approval and separate housing (price list option 26.1, 26.2)-25°C .. +80°C (-13 .. +176°F) VN ..050
Ventilation Ventilation is not required
Min. powder density Setting BVN 1000/ 5000: ca. 50 g/l (3 lb/ft3)
VN 2000/ 6000: ca. 20 g/l (1.2 lb/ft3) ca. 5 g/l (0.3 lb/ft3)
Setting Aca. 150 g/l (9 lb/ft3)
ca. 75 g/l (4.5 lb/ft3) Standard versionca. 20 g/l (1.2 lb/ft3) Enhanced sensitivity
Features of bulk material
No strong caking tendanciesMax. grain size 10 mm (0.39“)
Max. mechanical load 600 N laterally (on oscillator rods)Recommended protection in case of high material load: mounting of a protective canopy above the probe.
Max. mechanical torque 300 Nm VN ..030100 Nm VN ..040
Max. tractive force 2 kN VN ..050
Max. process pressure 16 bar (232 psi) VN ..020, VN ..03016 bar (232 psi) VN ..040 (depending on the quality of the local mounted sealing of the extension tube)
6 bar (87 psi) VN ..050
The max. process pressure may be reduced with use of flanges. Observe flange standards for pressure rating and pressure derating with higher temperature.
For versions with Ex-approvals: see remarks on page 31.
Vibration 1.5 (m/s2)2/Hz according to EN 60068-2-64
Relative Humidity 0 - 100%, suitable for outdoor use
Altitude max. 2,000 m (6,562 ft)
Expected product lifetime
Following parameters have a negative influence on the expected product lifetime: High ambient- and process temperature, corrosive environment, high vibration, high flow rate of abrassive bulk material passing the sensor element.
For versions withEx-approvals:see remarks onpage 33.
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Technical data
Transport and Storage
Transport Observe the instructions as stated on the transport packaging, otherwise the products may get damaged.Transport temperature: -40 .. +80°C (-40 .. +176°F)Transport humidity: 20 .. 85%Transport incoming inspections must be caried out to check for possible transport damage
Storage Products must be stored at a dry and clean place. They must be protected from influence of corrosive environment, vibration and exposure to direct sunlight.Storage temperature: -40 .. +80°C (-40 .. +176°F)Storage humidity: 20 .. 85%
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Approvals
Ordinary Locations*
•
•
•
•
•••
•••
CEFM/ CSATR-CU
EN 61010-1
Hazardous Locations *
•
•
•
•
•
•
••
•
•
••
ATEX Dust explosion
Gas explosion Intrinsic safe
FlameproofFlameproof/ increased safety
ATEX II 1D Ex t IIIC T! Da IP6X and 1/2 D Ex t IIIC T! Da/Db IP6XATEX II 1G Ex ia IIC T! Ga and 1/2G Ex ia IIC T! Ga/GbATEX II 2G Ex d [ia] IIC T! GbATEX II 2G Ex de [ia] IIC T! Gb
•
•
•
•
•
•••
•
•••
IEC-Ex Dust explosion
Gas explosion Intrinsic safeFlameproofFlameproof/ increased safety
IEC-Ex t IIIC T! Da IP6X and t IIIC T! Da/Db IP6XIEC-Ex ia IIC T! Ga and Ga/GbIEC-Ex d [ia] IIC T! GbIEC-Ex de [ia] IIC T! Gb
••
•
•
••
•
•
FM Dust explosion Gas explosion
Gas explosion
Gas explosion
Intrinsic safe
Flameproof
Flameproof/ increased safety
Cl. II, III Div. 1 Gr. E,F,GIS Cl. I Div. 1 Gr. A-DCl. I Zone 0 and 0/1 AEx ia IICXP-IS Cl. I Div. 1 Gr. B-DCl. I Zone 1 AEx d [ia] IICCl. I Zone 1 AEx de [ia] IIC
•
•
•
•
•
•
•
•
••
•
•
•
•
••
CSA
TR-CU
Dust explosion
Gas explosion
Gas explosion
Gas explosion
Dust explosion
Gas explosion
Intrinsic safe
Flameproof
Flameproof/ increased safety
Intrinsic safe
FlameproofFlameproof/ increased safety
Cl. II, III Div. 1 Gr. E,F,GEx DIP A20 and A20/21IS Cl. I Div. 1 Gr. A-DCl. I Zone 0 and Zone 0/1 Ex ia IICXP-IS Cl. I Div. 1 Gr. B-DCl. I Zone 1 Ex d [ia] IICCl. I Zone 1 Ex de [ia] IIC
Ex ta IIIC T! Da X andEx ta/tb IIIC T! Da/Db XEx ia IIC T! Ga X and Ex ia IIC T! Ga/Gb XEx d [ia] IIC T! Gb X Ex de [ia] IIC T! Gb X
• • •
•
•
•
•
•
•
•
INMETRO Dust explosion
Gas explosion Intrinsic safe
Flameproof
Flameproof/ increased safety
Ex ta IIIC T! Da IP6x andEx ta/tb IIIC T! Da/Db IP6XEx ia IIC T! Ga/Gb and Ex ia IIC T! GaEx d IIC T! GbEx d [ia Ga] IIC T! GbEx de IIC T! GbEx d e [ia Ga] IIC T! Gb
EMC • • • • EN 61326 -A1
Hygiene * • • • • EHEDG
RoHS conform • • • • According to directive 2011/65/EU
Food grade material
• • • • According to directive 1935/2004/EC
Pressure Equipment Directive (2014/68/EU)
The units are not subject to this directive, because they are classified as „pressure-keeping equipment“ and do not have a pressurized housing (see Art.1, clause 2.1.4).
The units are designed and manufactured in accordance to the Pressure Equipment Directive.The units are NOT intended for use as a “equipment part with safety function (Art.1, clause 2.1.3).If the units should be used as „equipment part with safety function, please contact the manufacturer.
* depending on selected version in the selection list.
VN
100
0
VN
200
0
VN
500
0
VN
600
0
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Options
Weather protection-cover
When the measuring device is used outdoor, the use of the weather protection-cover is recommended. It protects the device from all atmospheric influences such as:• rain water• condensation of water• excessively high temperatures due to insolation• excessively low temperatures in winter
Material: PE, weather and temperature stable
Not available for housing version d and de.For use in Hazardous Locations: only permitted for zone 2 and 22 or Division 2.
.
Sliding sleeve VN ..030 G2“ ISO 228 or 2” NPT ANSI B 1.20.1 Material: 1.4301 (304) or 1.4404 (316L) Sealing material to the extension tube: viton
VN ..040 Because the outer diameters of the locally mounted 1“ tube may differ, sliding sleeve on request. Not for Hazardous Locations.
Mounting set Screws and washers for fixing the unit on a flange.
Glass window in lid To see the indicating light on the electronic module from outside.
Not available for housing version d and de.
Bulb Bright indicating light seen from outside.
Not available for use in Hazardous Locations.
Plug 4-pole (incl. PE) Used instead of cable gland.
Not available for use in Hazardous Locations and FM/ CSA general Purpose.
EHEDG approval EHEDG conform design (material and construction in contact with the process).
Approved with flush welding socketMaterial: aluminium or 1.4301 (304) or 1.4404 (316L)(details see: mounting instructions EHEDG version, page 16).
LED
Glass window
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Detection of solids in water CAUTION:Detection of solids in water only permitted with types VN 1020/ 1030/ 5020/ 5030.Other types on request.
Process pressure Improper installation may result in loss of process pressure.
Chemical resistance against the medium
Materials of construction are choosen based on their chemical compatibility (or inertness) for general purposes. For exposure to specific environments, check with chemical compatibility charts before installing.
VN ..050: Consider the chemical compatibility of the extension cable (material PUR) and the rubber seals on both ends of the extension cable (material neoprene).
Mechanical load The torque at the fastening spot must not exceed 300 Nm (VN ..030) or 100 Nm (VN ..040)
Maximum length „L“ in relationto the deviation (in degrees) from vertical installation:
Mounting location Comply with distance from incoming material and from the silo wall.The installation has to be done in a way, that the sensor elements cannot hit the wall of the silo. The flow of the medium and fixtures in the container must be considered. This is especially important for extension lengths of more than 3 m (118.1“).
2“ sliding sleeve Tighten both locking screws M8 with 20 Nm to obtain resistance against pressure.
Flange mounting A plastic sealing must be used to tighten the flange.
Fastening of the 1½” process connection
Mounting torque for the 11/2” thread may not exceed 80 Nm.Use a 50 mm (1.97“) open-end wrench (do not turn the housing).
EHEDG-approval/ food grade material
The materials are available for the use under nornal and predictable applications (according to directive 1935/2004 Art.3). Other conditions can influence the safety.
Max. deviation Max. length “L”
5° 4,000 mm (157.5“)
45° 1,200 mm (47.24“)
>45° 600 mm (23.62“)
Load
Mounting
General Safety Instructions
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Oscillating rods Do not bend, shorten or extend the oscillationg rods since this will destroy the device.
Rotatable housing and orientation marking of oscillating rods
Direction of the cable glands When the unit is mounted from the side, ensure, that the cable glands are closed and face downwards to avoid water penetrating the housing.
Sealing Seal the 1½” thread with Teflon tape in case of process pressure
Precaution for later dismounting/ Service
Grease the screws of the lid if corrosive atmosphere is present (e.g. close to sea)
Switching point Heavy bulk material -> the signal output switches, when the oscillating rods are covered a few mm.Light bulk material -> the signal output switches, when the oscillating rods are covered a few cm.
The housing can be rotated against the threaded connection after mounting. For the d- and de- housing: Fixing screw must be unfastened to enable rotation. Fix the screw again, when the housing has the right position.
Orientation marking of oscillating rods shows the orientation of the oscillating rods after mounting. Fixing screw
Housing
Additional Safety Instructions for Hazardous Locations
Installation regulations For the use of devices in Hazardous Locations the respectively valid installation regulations must be observed.
Sparks The installation has to be carried out in a way, that mechanical friction or impact does not cause sparks between the aluminium enclosure and steel.
Mounting in application with Partition wall, that separates Zone 0 (Cat. 1G) from Zone 1 (Cat 2G).
VN ..030 with sliding sleeve: The use of the sliding sleeve is not allowed.VN ..040 and VN ..050: The unit has no safe separation between Zone 0 and Zone 1. It must be considered, that gas can pass from Zone 0 through the unit to Zone 1.
Mounting instructions
Threaded connection
Mounting
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Mounting
EHEDG-approval The sealing ring ensures a pressure tight sealing of the process connection.
Metal-metal sealing:• The support muß be plane and without any gap. • Fixing torque 100 Nm
The quality of the welding with the container wall must be according to the respective regulations (e.g. gaps, transitions, surface finish).
Metal-metalsealing
welding with container wall
Flush welding socket
Dimension of flush welding socket (for optional on site manufacturing):
Length of extension L
Sealing ringCap nut
Basic unit with process connection Cap nut (pos.5 G)
Surfaces in contact with process Ra ≤0.8 µm
Section A Section B
Dimensions in mm
* suggested values(in brackets values to be adhered bindingly)
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2“ sliding sleeveSwitch point can be set
CAUTION:Detection of solids in water only permitted with the types VN 1020/ 1030/ 5020/ 5030.Other types on request.
Bulk material slides down more easily, if the device is mounted with inclination(recommended)
Sensitivearea
Full detector
Empty detector
Observe max. torque
Empty detector
Protective canopy in case of high mechanical loading(approx. 200 mm (7.87“) distance)
Installation in the conical part: only for trickling material, that cannot be pressed between the vibration rods.
CORRECT
WRONGOrientation marking of oscillating rods faces sideways.Working surface too large:-> overload, if material is discharged-> danger of caking or crust deformationCORRECT
Vibrating rods lead into the product
WRONGSocket too long:material chokessocket
VN ..050Observe max. tensile load(also imparted to silo roof)
Mounting
VN ..020 orVN ..030 orVN ..040
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VN ..050 VN ..030 VN ..040
VN ..030
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Electrical installation
General Safety Instructions
Handling In case of inexpert handling or handling malpractice, the electric safety of the device cannot be guaranteed.
Installation regulations The local regulations or VDE 0100 (Regulations of German Electrotechnical Engineers) must be observed.With use of 24 V supply voltage, an approved power supply with reinforced insulation to mains is required.
Fuse Use a fuse as stated in the connection diagrams (page 22 and 23).
RCCB protection In the case of a defect, the distribution voltage must automatically be cut off by a RCCB protection switch to protect the user of the device from indirect contact with dangerous electric tensions.
Power supply switch A voltage-disconnecting switch must be provided near the device.
Wiring diagram The electrical connections are made in accordance with the wiring diagram.
Supply voltage Compare the supply voltage applied with the specifications given on the electronic module and name plate before switching the device on.
Cable gland Make sure that the screwed cable gland safely seals the cable and that it is tight (danger of water intrusion).Cable glands that are not used have to be locked with a closing element.
Conduit system In case of using a conduit system (with NPT thread) instead of a cable gland the regulations of the country, where the unit is installed, must be observed. The conduit must have a tapered thread either NPT 1/2“ or NPT 3/4” in accordance with the unit and ANSI B 1.20.1. Not used inlets must be closed tight with a metal closing element.
Field wiring cables • The diameter has to match to the clamping range of the used cable gland.• The cross section has to match with the clamping range of the connection terminals and consider the max. current. • All field wirings must have insulation suitable for at least 250V AC. • The temperature rating must be at least 90°C (194°F).• If higher immunity interferences as specified in the stated EMC standards are present (see chapter approval), a shielded cable is required, otherwise an unshielded instrumentation cable is satisfactory.
Connecting the terminals Make sure that max. 8 mm (0.31“) of the pigtails are bared (danger of contact with live parts).
Guiding the cables in the terminal box
Cut the field wiring cables to appropriate length to fit properly into the terminal box.
Relay and transistor protection
Provide protection for relay contacts and output transistors to protect the device against inductive load surges.
Protection against static charging
The housing of the unit (and for the version with separate housing also the vibrating fork part) must be grounded to avoid static charging of the unit. This is particularly important for applications with pneumatic conveying and non-metallic containers .
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Additional Safety Instructions for Hazardous Locations
Installation in Zone 20 If installing the whole unit in zone 20, the power supply shall be rated for a prospective short circuit current of not more than 10 kA. Details of EN 60079-14/ ABNT NBR IEC 60079-14 must be obeyed.
Installation in Zone 0(Electronics: „NAMUR“and “8/16mA or 4-20mA”)
The intrinsic safe supply circuit must have galvanic isolation to non intrinsic safe part. Otherwise measures for protection against lightning must be taken. See EN 60079-14/ ABNT NBR IEC 60079-14.
Power supply (Electronics: „NAMUR“and “8/16mA or 4-20mA”)
The type of protection (intrinsic safe) is only valid when connecting to a certified intrinsic safe power supply (associated apparatus).
Field wiring terminals for “de” housing
Fixing torque : 0,5-0,6 NmRemove wire isolation: 9 mm
Field wiring A strain relief must be provided for the field wiring cables, when the device is installed with the factory provided cable glands.
External equipotentialbonding terminal
Connect withequipotential Version with seperate housing must be bonding to grounded additionally at the vibrating fork.the plant
Cable glands and conduit system for ATEX/IEC-Ex/ TR-CU(Dust and Gas Hazardous Locations)
Installation according to the regulations of the country, where the product is installed.
Not used entries have to be closed with blanking elements certified for this purpose.
Where available the factory provided parts must be used.
A strain relief must be provided for the field wiring cables, when the device is installed with the factoryprovided cable glands.
The diameter of the field wiring cable must match to the clamping range of the cable clamp.
If other than the factory provided parts are used, following must be ensured:The parts must have an approval adequate to the approval of the level sensor (certificate and type of protection).The approved temperature range must be from the min. ambient temperature of the level sensor to the max. ambient temperature of the level sensor increased by 10 Kelvin. The parts must be mounted according to the instructions of the supplier. Installation of a flameproof/ explosion proof enclosure with a conduit system:In a conduit system single electric conductors are installed in a certified pipe system. This pipe system is in a flameproof/ explosion proof construction as well. The flameproof/ explosion proof enclosure and the pipe system needs to be sealed from each other by a certified flameproof seal of a type “d” or explosion proof of a type “XP”.This seals shall be installed directly in or at the conduit entries of the flameproof/ explosion proof enclosure. Not used entries have to be closed with blanking elements certified for this purpose (flameproof type “d” or explosion proof type “XP”).
Electrical installation
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Conduit system for FM and CSA (Dust and Gas Hazardous Locations)
General requirements:In addition the regulations of the country must be observed. The used flameproof seals and blanking elements must have an adequate type approval and a temperature range of at least –40°C (-40°F) to +80°C (176°F). In addition they shall be suitable for the conditions and correctly installed. Where available the provided original parts of the manufacturer must be used.
Installation of a flameproof enclosure “d” with a conduit system:In a conduit system single electric conductors are installed in a certified pipe system. This pipe system is in a flameproof construction as well. The flameproof enclosure “d” and the pipe system needs to be sealed from each other by a certified flameproof seal. Conduit entries of a flameproof enclosure “d” shall have installed the flameproof seal within 18 inches from the enclosure wall. Not used entries have to be closed with adequate blanking elements of a certified flameproof type AEx Cl.1 Div.1 A.
Commissioning Commissioning only with closed lid. Exception: Units with protection method Intrinsic safety (“NAMUR” and “8/16 mA or 4-20 mA”)
Opening the lid Units with flameproof GasExplosion approval (d-housing):To prevent ignition of hazardous atmospheres, do not remove the lid (cover) while circuits are alive.
Units with Dust Explosion approval:Before opening the lid ensure, that no dust deposits or cloudss are present.Do not remove the lid (cover) when the power is live.
Units with protection method Intrinsic safety (“NAMUR” and “8/16 mA or 4-20 mA”):The lid can be removed when the power is live.
Electrical installation
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Electrical installation
VN 1000/ 2000: Standard-housing
Ground-terminal on the electronic module is connected internally to the housing (not all versions)
Connecting terminals
Protective ConductorTerminal
VN 5000/ 6000: Standard- and d-housing
Connection is done directly on the Electronic module
Ground-Terminal on the electronic module is connected internally to the housing (not all versions)
Protective ConductorTerminal
Connecting terminals
de-housing
Connection via the terminalsinside the increased safety area.
Protective ConductorTerminal
Connection terminals
Connection
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Universal voltageRelay SPDT
Power supply:19 .. 230V 50 - 60 Hz +10% 8 VA19 .. 55 V DC +10% 1.5 W
Signal output:Floating relay SPDT
VN 1000/ 2000:AC max. 253 V, 4 A, 500 VA at cos Phi = 1DC max. 253 V, 4 A, 60 W
VN 5000/ 6000:AC max. 250 V, 8 A, non inductiveDC max. 30 V, 5 A, non inductive
Fuse on signal output: max. 10 A,slow or fast, HBC, 250 V
Universal voltageRelay DPDT
Power supply:19 .. 230 V 50 - 60 Hz +10% 18 VA19 .. 55 V (36 V*) DC +10% 2 W
Signal output:Floating relay DPDT
VN 1000/ 2000:AC max. 253 V, 4 A, 500 VA at cos Phi = 1DC max. 253 V, 4 A, 60 W
VN 5000/ 6000:AC max. 250 V, 8 A, non inductiveDC max. 30 V, 5 A, non inductive
Fuse on signal output: max. 10 A,slow or fast, HBC, 250 V
* Version with intrinsic safe connection between electronic module and vibration fork (see pos.4 in the selection list)
3-wire PNP
Power supply:18 .. 50 V DC +10% 1.5 W
Fuse: max. 4 A, slow or fast, HBC, 250 V
Signal output:max. 0.4 A
Load for example: PLC, relay, contactor, bulb
PE + - Signal output L NPower supply
PE + -Power supply
Load
Electrical installation
PE + - Signal output L NPower supply
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Electrical installation
2-wirewithout contact
Power supply:19 .. 230 V 50/60 Hz +10% 1.5 VA19 .. 230 V DC +10% 1 W
Load:min. 10 mAmax. 0.5 A permanent(detailed ratings see “Technical data”)
Load for example: relay, contactor, bulb
Fuse: max. 4 A, slow or fast, HBC, 250 V
NAMURIEC 60947-5-6
Power supply:ca. 7 .. 9 V DCintrinsic safe(spec. IEC 60947-5-6)
<1 mA or > 2.2 mA(spec. IEC 60947-5-6)
8/16mA or 4-20mA
Power supply:Non intrinsic safe version:12.5 .. 36 V DC +0%
Intrinsic safe version: 12.5 .. 30 V DC +0%
Signal outputSetting 8/16 mA: 8 mA or 16 mA
Setting 4-20 mA: Output current depends on the vibration amplitude of the fork: 6mA for dampened vibration and 20 mA for full vibration.
8/16mA Power supply:12.5 .. 36 V DC +0%
Signal output8 mA or 16 mA
PE + - L N Power supply
PE + - Power supplyspec. IEC 60947-5-6
PE + - Power supply
PE + - Power supply
Load
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Signal output
Electronic modules:
Universal voltage(Relay SPDT and DPDT)
3-wire PNP
2-wirewithout contact
8/16mA
NAMUR(IEC 60947-5-6)
FSL/ FSH or Characteristic Setting
Remark: „FSH/ FSL“ is used for electronic modules: Universal voltage, 3-wire, 2-wire "Characteritic" is used for electronic module: NAMUR
If the sensor is used to indicate full load, set to Fail Safe High or Falling Characteristic. Power failure or line break is regarded as „full“ signal (protection against overcharging).
If the sensor is used to indicate empty load, set to Fail Safe Low or Rising Characteristic. Power failure or line break is regarded as „empty“ signal (protection against running dry).
LED „Signal output“
Setting FSL/ FSH or Characteristic
Signal output
Setting
Relay SPDT
Relay DPDT
3-wire PNP
2-wire without contact
8/16mA
LED „Signal output“
Setting
NAMURIEC 60947-5-6
LED „Signal output“
Electronic module
Signal output
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FSL FSH FSL FSH
FSH
FSL
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Signal output delay
Electronic moduleUniversal voltage(Relay DPDT)
Signal output delay
The signal output can be delayed, adjustable from 0 up to ca. 30 seconds. Clockwise turning of the potentiometer increases the delay time.
Potentiometer T1: Delay when output switches from sensor covered -> free
Potentiometer T2: Delay when output switches fromsensor free -> covered
Electronic moduleNAMUR(IEC 60947-5-6)
“TEST” Button
If the sensor is not covered with material:By pressing this button, the vibration will stop and the signal output will switch to indicate “covered sensor”. This allows to test the vibration and the electronics for function without removing the sensor from the silo.Remark: By pressing the button, the internal signal from the piezo-element, that indicates the vibration of the fork, is shortened. The electronics miss the vibration signal and indicates “covered sensor”.
If the sensor is covered with material:Pressing of this button has no effect.
Weak vibration Diagnosis: LED “Diagnosis”
The quality of the measurement is related to the vibration amplitude of the sensor and can be evaluated by the internal LED „Diagnostics“ as follows:
• Safe measurement, clean fork (LED is off):The vibration amplitude is strong. There is enough safety to the switching point.
• Weak vibration amplitude (LED is blinking):The sensor is still working but it can happen that gradually the amplitude decreases further (maybe by increasing material build up) and the measurement fails. If low vibration amplitude is indicated the sensitivity setting should be changed from „20g/l“ to “75 g/l” (or from „5g/l“ to „20g/l“ on version with enhanced sensitivity) if material density is not too low and the fork should be cleaned from material. Remark: By shifting the setting to “75g/l” (or to „20g/l“ on version with enhanced sensitivity), the internal amplification of the vibration signal in the electronic is increased. This allows more build up of material.
• Fork fully covered (LED is on):The sensor is fully covered with material. The vibration has stopped.
Diagnostics
Signal output delay / Diagnosis
“TEST”Button
Electronic module
LED „Diagnosis“
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Electronic module8/16 mA or 4-20 mA
The output can either be set to give 8/16 mA or to give 4-20 mA. On setting 4-20 mA the output depends on the amplitude of the vibration of the fork.
Characteristic setting
If the sensor is used to indicate fullload, set to Falling Characteristic.Power failure or line break is regarded as „full“ signal (protection against overcharging).
If the sensor is used to indicate empty load, set to Rising Characteristic.Power failure or line break is regarded as „empty“ signal (protection against running dry).
Weak vibration diagnosis
The quality of the measurement is related to the vibration amplitude of the sensor and can be evaluated by the output current and by the internal LED „Diagnosis“ as follows:
• Safe measurement (clean fork):The vibration amplitude is strong. There is enough safety to the switching point.
• Weak vibration amplitude: A fork with so much material build up, that a weak vibration amplitude is indicated.The sensor is still working, but it can happen, that gradually the amplitude decreases further (maybe by increasing material build up) and the measurement fails. If low vibration amplitude is indicated, the sensitivity setting should be changed from „High sensitivity“ to „Low sensitivity“, if material density is not too low, and the fork should be cleaned from material. Remark: By shifting the setting to „Low sensitivity“, the internal amplification of the vibration signal in the electronic is increased. This allows more build up of material.
• Fork fully covered:The sensor is fully covered with material. The vibration has stopped.
“TEST” Button
If the sensor is not covered with material:By pressing this button, the vibration will stop and the signal output will switch to indicate “covered sensor”. This allows to test the vibration and the electronic for function without removing the sensor from the silo.Remark: By pressing the button, the internal signal from the piezo-element, that indicates the vibration of the fork, is shortened. The electronic misses the vibration signal and indicates “covered sensor”.
If the sensor is covered with material:Pressing of this button has no effect.
Factory provided settings
• D OFF • 8/16 mA • • High sensitivity
“TEST”Button
Electronic module
LED „Diagnosis“
Low sensitivity
LED „Signal output“ Settings Highsensitivity
Low sensitivity High sensitivity
VN 1000/ 5000 150 g/l (9 lb/ft3) 50 g/l (3 lb/ft3)
VN 2000/ 6000 75 g/l (4,5 lb/ft3) 20 g/l (1.2 lb/ft3)
VN 2000/ 6000with enhanced sensitivity
20 g/l (1.2 lb/ft3) 5 g/l (0.3 lb/ft3)
Signal output and Diagnosis
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Electronic module8/16 mA or 4-20 mA
Output setting: 8/16 mA
The figure illustates the output current depending on the situation with:• Safe measurement (clean fork).• Weak vibration amplitude: a fork with so much material build up, that a weak vibration is indicated.• Fork fully covered.
The output current can indicate the weak vibration with diagnostics setting „D ON“.
Diagnosis off (setting „D OFF“):The output changes between 8 mA and 16mA.
Diagnosis on (setting „D ON“):The output will change from 16 mA to 20 mA and from 8 mA to 6 mA, if the vibration is weak. This enables a evaluation on an external 4-20 mA power supply. There is an internal delay of 10 seconds, until the change from 16mA to 20 mA and from 8 mA to 6 mA happens, so that the external power supply does not indicate „weak vibration“, when the vibration is stopped and is started during normal (safe) measurement operation.
Example of evaluating the diagnosis of weak vibration amplitude:
Connection of an external Limit Value Monitor with 4-20 mA input and two relay outputs.(Fitting units can be ordered as accessories, see price list)
Relay 1 indicates the situation: Full/ empty. Relay 2 works as a diagnostics output to indicate: Safe measurement/ Non safe measurement (weak vibration).
Relay 1: Full/ emptySet switching point to 10 mA.
Relay 2:DiagnosisSet switching point to:
18 mA for setting "falling characteristic"
7 mA for setting "rising caracteristic"
Characteristicsetting
Dsetting
LED „Signal output“
LED „Diagnosis“
Electronic module
Relay 2
Relay 1
External Limit Value Monitor with 4-20 mA input and two relay outputs.
Signal output and Diagnosis
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Signal output and Diagnosis
Electronic module8/16 mA or4-20 mA
Output setting: 4-20 mA
The output states the quality of the vibration signal (amplitude) of the sensor. With the 4-20 mA setting it is possible, to recognize material build up on the vibrating fork by evaluation with a PLC. Furthermore it is possible to evaluate the vibration behaviour for critical applications by using a 4-20 mA Data logger or PLC.
RemarkIn this mode:• The switch „D ON“ or „D OFF“ has no influence.• The LED „Signal output“ is off.
Output current:• 20 mA: The vibration amplitude is strong (safe measurement, clean fork). With interface measurement (VN 10..0 und VN 50..0) a max. vibration amplitude of approx. 15 mA occurs.
• < 20mA and >12/ 12.5mA: The vibration amplitude is decreased by material build up or mechanical influence. On setting „Low sensitivity“ the material build up must be more to decrease the output current compared to setting „High sensitivity“.
• <12/12.5 mA and >7/8 mA: The recommended range indicate a weak vibration. This is also the range, where the internal LED „Diagnosis“ starts blinking to indicate a weak vibration. Depending on the application this value can be changed in the PLC. The evaluation in the PLC should be done so, that a window between 12/12.5 mA and 7/8 mA is set. The reaction to indicate „weak vibration“ should be delayed for approx. 10 seconds, so that the indicaton does not happen when the vibration is stopped and is started during normal and safe measurement operation. A lag of 0.5 mA (between 12 mA and 12.5 mA) should be considered to avoid jittering of the output.
• 7/8 mA: The recommended point to indicate a covered sensor. The point is close to the stop of the vibration at 6 mA. Depending on the application this point can be changed in the PLC. A delay of 1 mA (between 7mA and 8mA) should be considered to avoid jittering of output.
• 6 mA: The vibration has fully stopped.
Increasing material build up
Out
put
cur
rent
With setting „High sensitivity“: With setting „Low sensitivity“:
Amplitude is 100% Amplitude is 100%
Amplitude is 0% Amplitude is 0%
Damping by material
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All Electronic modules
Sensitivity All sensors are factory preset. Normally it is not necessary to change the settings. If the bulk material has a strong tendancy to cake or deposit the setting switch can be set to position „A“ to decrease the sensitivity of the probe (factory presetting = position „B“).
Approximate min. bulk density on setting:
VN 1000/ 5000:For measurement of solids in water setting „A“ is recommended or to take the electronic with potentiometer.
Option interface measurement(Sensitivity adjustable with potentiometer)
Turn to Min: Vibrating fork gets less sensitive
Turn to Max: Vibrating fork gets more sensitive
„Sensitivity“ setting
ALow sensitivity
BHigh sensitivity
VN 1000/ 5000 150 g/l (9 lb/ft3) 50 g/l (3 lb/ft3)
VN 2000/ 6000 75 g/l (4.5 lb/ft3) 20 g/l (1.2 lb/ft3)
VN 2000/ 6000with enhanced sensitivity
20 g/l (1.2 lb/ft3) 5g/l (0.3 lb/ft3)
Setting: Sensitivity
Electronic module
Electronic module
PotentiometerSensitivity
Min Max
„Sensitivity“ setting not possible
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Changing the Electronic module
Intrinsic safe marked Electronic modules are not allowed to be exchanged with Electronic modules without Intrinsic safe marking. Observe warning labels inside the housing and Ex marking on the name plate.
1. Open the housing lid, remove the pigtails from the device.2. Disconnect internal wire for earth connection (not on all versions).3. Unscrew two fastening screws of the electronic module.4. Pull out the Electronic module.5. Insert a new Electronic module (until it locks into place) and tighten fastening screws.6. Connect internal wire for earth connection (not on all versions).7. Connect the pigtails to the device.
Opening the lid (cover) Before opening the lid for maintenance reasons observe following items: • Do not remove the lid while circuits are alive.• No dust deposits or whirlings are present.• No rain can enter into the housing.
Frequent check of the unit
Frequent check of the unitTo ensure durable safety in hazardous locations and with electrical safety, following items must be checked frequently depending on the application:• Mechanical damage or corrosion of any components (housing side and sensor side) and of the field wiring cables.• Thight sealing of the process connection, cable glands and enclosure lid.• Properly connected external PE cable (if present).
Cleaning Cleaning If cleaning is required by the application, following must be observed:• Cleaning agent must comply with the materials of the unit (chemical resistance). Mainly the lid sealing, cable gland and the surface of the unit must be considered.
The cleaning process must be done in a way, that:• The cleaning agent cannot enter into the unit through the lid sealing or cable gland.• No mechanical damage of the lid sealing, cable gland or other parts can happen.
Units with EHEDG certification, which are used in the respective EHEDG applications, must be cleaned dry only (Type ED). Furthermore the respective regulations must be observed.
A possible accumulation of dust on the unit does not increase the maximum surface temperature and must therefore not be removed for purposes of maintaining the surface temperature in hazardous locations.
Function test A frequent function test may be required depending on the application.
Observe all relevant safety precautions related with a safe work depending on the application (e.g. hazardous locations, hazardous bulk material, electric safety, process pressure).
This test does not proof if the sensor is sensitive enough to measure the material of the application.
Function test is done by stopping the vibration of the vibrating rods with appropriate means and monitor if a correct change of the signal output from uncovered to covered happens.
Production date The production date can be traced by the serial number on the typeplate. Please contact the manufacturer or your local distrubutor.
Spare parts All available spare parts are stated in the selection list
Maintenance
Repair of flamepathRepair of flamepath on units with Ex d, Ex de or XP approvals is not intended. Please contact manufacturer.
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Zone classification
usable in zone ATEXcategory
IEC-ExEquipement Protection Level (EPL)
Dust applications 20, 21, 22 1 D Da
21, 22 2 D Db
22 3 D * Dc
Gas applications 0, 1, 2 1 G Ga
1, 2 2 G Gb
2 3 G Gc
General Notes
Marking Devices with Ex approval are marked on the name plate.
Process pressure The device construction allows process over-pressure up to 6/ 16 bar (87/ 232 psi) (see name plate). These pressures are allowed for test purposes. The definition of the Ex approvals are only valid for a container-over-pressure between -0.2 .. +0.1 bar (-2.9 .. +1.45 psi).For higher or lower pressures the approvals are not valid.
Process and ambient temperature
The permitted temperature ranges are marked on the name plate.
Notes for use in Hazardous Locations
* in case of conductive dust additional requirements for the installation may be necessary
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Notes for use in Hazardous Locations
Permitted zones (categories) for mounting in partition wall
Version with standard-housing (VN 1000/ 2000/ 5000/ 6000)
Version with d- and de-housing (VN 5000/ 6000 ; flameproof/ increased safety)
With use of all Electronic modules:
with separate housing
with separate housing
With use of Electronic module:
Universal voltage Relay SPDTUniversal voltage Relay DPDT3-wire PNP2-wire without contact8/16 mA or 4-20 mA(non intrinsic safe)
NAMUR IEC 60947-5-6(intrinsic safe) *8/16 mA or 4-20 mA(intrinsic safe) *
* The units are marked on the name plate with “1G” and “1D” (ATEX) resp. "Ga" and "Da" (IEC-Ex).They can be also be mounted in a partition wall with specification zone 0/1 and zone 20/21.
** VN ..040 and VN ..050:When mounting the units in a partition wall, that separates Zone 0 from Zone 1: The units have no safe separation between Zone 0 and Zone 1. It must be considered, that gas can pass from Zone 0 through the unit to Zone 1.
EPL (IEC-Ex) Da Db Da Db Ga Gb **
Category (ATEX) 1D 2D 1D 2D 1G 2G **
Zone 20 21 20 21 0 1
EPL (IEC-Ex) Da Da Da Da Ga Ga
Category (ATEX) 1D 1D 1D 1D 1G 1G
Zone 20 20 20 20 0 0
EPL (IEC-Ex) Gb DbCategory (ATEX) 2G 2DZone 1 21
EPL (IEC-Ex) Gb DaCategory (ATEX) 2G 1DZone 1 20
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VN ..020VN ..030
VN ..040 VN ..050
VN ..020VN ..030
VN ..020VN ..030
VN ..040 VN ..050
VN ..020VN ..030
Level limit switchSeries VN 1000 / 2000 / 5000 / 6000Technical information / Instruction manual
page
Notes for use in Hazardous Locations
Max. Surface Temperature and Temperature Class
The temperature marking on the name plate refers to the instruction manual.On the following tables the relevant temperature ratings are shown.
The maximum surface temperature (resp. temperature class) is the warmest temperature of the unit which could occur during malfunction (according to Ex-definition).
The data tables are valid, when it can be guaranteed during installation that the screwed connection has a maximum temperature of 80°C (176°F) during normal use.
max. 80°C (176°F)
ambient side
processside
Nozzle
Versions with intrinsic safe electronic modules:NAMUR IEC 60947-5-68/16 mA or 4-20 mA
Max. ambienttemperature
Max. process-temperature
Max. surface temperature
Temperature class
(Division System)
Temperature class
(Zone System)
60°C (140°F)
80°C (176°F) 120°C (248°F) T4A T4
90°C (194°F) 120°C (248°F) T4A T4
100°C (212°F) 120°C (248°F) T4A T4
110°C (230°F) 120°C (248°F) T4A T4
120°C (248°F) 120°C (248°F) T4A T4
130°C (266°F) 130°C (266°F) T4 T4
140°C (284°F) 140° C (284°F) T3C T3
150°C (302°F) 150° C (302°F) T3C T3
Versions with non intrinsic safe electronic modules:Universal voltage Relay SPDTUniversal voltage Relay DPDT3-wire PNP2-wire without contact8/16 mA or 4-20 mA
Max. ambienttemperature
Max. process-temperature
Max. surface temperature
Temperature class
(Division System)
Temperature class
(Zone System)
50°C (122°F) 70°C (158°F) 80°C (176°F) T6 T6
60°C (140°F)
80°C (176°F) 85°C (185°F) T6 T5
90°C (194°F) 90°C (194°F) T5 T5
100°C (212°F) 100°C (212°F) T5 T4
110°C (230°F) 110°C (230°F) T4A T4120°C (248°F) 120°C (248°F) T4A T4130°C (266°F) 130°C (266°F) T4 T4
140°C (284°F) 140° C (284°F) T3C T3
150°C (302°F) 150° C (302°F) T3C T3
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Level limit switchSeries VN 1000 / 2000 / 5000 / 6000Technical information / Instruction manual
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Assembly VN ..040
Manufacturing of the Extension tube
Obtain instruction manual for proper manufacturing of the extension tube. In case of deviation from the instruction manual the unit is not safe for use in Hazardous Locations.
Demands on the Extension tube
Material: Stainless steel 1.4301 (SS304) or 1.4305 (SS301) or 1.4571 (SS316Ti) or 1.4404 (SS316L)
The tube must be manufactured from one single piece. It is not allowed to weld two or more pieces together.
Carefully observe max. length, diameter, wall thickness, thread, tolerances as specified in the drawing.
All sharp edges must be removed to protect the cable and sealing rings.
Thread testing Each thread must be tested with no-go ring gauge according to standard DIN ISO 228-1 (G1“) (G-version) or ANSI B 1.20.1 (NPT 1“) (NPT version)
Version with G1” (DIN ISO 228-1) thread (selection price list pos.5 A,L,M)
Version with 1” (ANSI B 1.20.1) NPT thread(selection price list pos.5 B,S,T,U)
Thread 1” NPT ANSI B 1.20.1Effective thread length: 17.3 +2 mm (0.68 +0.08“)(dimension L2 according to standard ANSI B 1.20.1)
free from burrs
same as the other end
same as the other end
free from burrs
effe
ctiv
e th
read
leng
th
Pipe length X: VN 1040: X = L - 180 mm (X = L - 7.1") VN 2040: X = L - 250 mm (X = L - 9.8") VN 2040 with pos.26 x,a,b: X = L - 275 mm (X = L - 10.8")Note: L is the total extension length
Pipe length X: VN 1040: X = L - 190 mm (X = L - 7.5") VN 2040: X = L - 260 mm (X = L - 10.2") VN 2040 with pos.26 x,a,b: X = L - 285 mm (X = L - 11.2")Note: L is the total extension length
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Level limit switchSeries VN 1000 / 2000 / 5000 / 6000Technical information / Instruction manual
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Assembly VN ..040 with standard housing
Assembly of the unit
1. Mounting of the Extension tube
The tube must be assembled very carefully to ensure permanent sealing and mechanical stability.Observe the follow mounting instructions.
Make sure that the thread of the extension tube and the thread of the screwed piece/ oscillating piece is the same type (do not mix G and NPT thread).
1.1. Feed the connecting wire through the 1“ Extension tube and the screwed piece. Use a separate taut wire for easy working.
1.2. Screw the 1“ Extension tube into the oscillating piece and the screwed piece. Tightening torque 50 Nm.Use a 36 mm (1.42“) open-end wrench to attach the fork piece (do not use the forks).
G version: Tighten the 2 fixing screws.
Requirements for sealing:
There must be tight connections at both ends of the extension tube (IP67 or NEMA 4).
G version: An O-ring is required at both ends to ensure proper sealing and must not be damaged. Only original O-rings from the manufacturer are allowed to be used.
NPT version: The threads must be sealed with temperature resistant sealing for 150°C (302°F). Max. thickness of the sealing is 0.2 mm (0.008").
Connecting wire
Cable gland
Housing
Screwed piece
Fixing screw for G-version
1“ Extension tube
For versions with gas-Excertification. Marking tapewith text "intrinsically-safecircuit"
Fixing screw forG-version
Width across flat 36 mm (1.42“)
Oscillating piece
Oscillating rods
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Level limit switchSeries VN 1000 / 2000 / 5000 / 6000Technical information / Instruction manual
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Assembly VN ..040 with standard housing
2. Preparing the cables
Shorten the earth cable to 220 mm (8.66“) and sensor cables to 150 mm (5.9“). Prepare cables as shown.
3. Connecting the cables
Connect sensor cables to the terminal connection piece. Fix the cables with cable clamps. Connect electronic module and terminal connection piece. Be sure that all terminals are tightly screwed in.
Take care that the non isolated shield wire (M) does not touch other metal parts (keep wire short or isolate with a hose)
Connect the earth cable from the vibrating fork to the housing (see figure at the bottom of this page).
4. Fixing the electronic module
Insert electronic module into housing. The terminal connection piece is used to guide the cables. Fold connection cables as shown.Use cylinder head screws to fix the electronic module.
Connect the earth cable from the electronic module to the housing (not on all versions).
Earth cable (green-yellow)
Sensor cables
4= black (T)3= shield (M)2= red (R-)1= white (R+)
Earth cable from the electronic module
Earth cable from vibrating fork
Terminal connection piece
Electronic module:
Flat side must shown upwards!
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Level limit switchSeries VN 1000 / 2000 / 5000 / 6000Technical information / Instruction manual
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Assembly VN 5040/ 6040 with d or de-housing
Assembly of the unit
1. Mounting of the Extension tube to oscillating piece and preparing cables
The tube must be assembled very carefully to ensure permanent sealing and mechanical stability. Observe the follow mounting instruction.
Make sure, that the thread of the extension tube and the thread of the screwed piece/ oscillating piece is the same type (do not mix G and NPT thread).
1.1. Feed the connecting wire through the 1“ Extension tube. Use a separate taut wire for easy working.
1.2. Screw the 1“ Extension tube into the oscillating piece. Tightening torque 50 Nm.
Use a 36 mm (1.42“) open-end wrench, do not turn the oscillating rods.
G version: Tighten the Fixing screw
Requirements for sealing:
There must be a seal connection between the 1“ tube and the screwed piece and the oscillating piece (IP67 or NEMA 4).
G version: An O-ring is required at both ends to ensure proper sealing and must not be damaged. Only original O-rings from the manufacturer are allowed to be used.
NPT version: The thread must be sealed with temperature resistant sealing for 150°C (302°F). Max. thickness of the sealing is 0.2 mm (0.008").
1.3. Shorten all cables to 80 mm (3.15“). Prepare cables as shown.
Sensor cables
Earth cable
1“ Extension tubescrewed in Oscillating piece
For versions with Gas-Ex certification: Marking tape with text "Intrinsically-safecircuit"
Width across flat 36 mm (1.42“)
Oscillating piece
Oscillating rods
Fixing screw for G-version
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Level limit switchSeries VN 1000 / 2000 / 5000 / 6000Technical information / Instruction manual
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2. Soldering the cables
Guide the big shrink hose over all cables.
Guide the small shrink hose over each cable.
Solder the cables as shown.
Shrink the small shrink hose with a hot air blower. Ensure that the exposed wires are all covered with shrink hose
3. Shrinking all cables
Push the big shrink hose over the small shrink hosesand shrink with a hot air blower.
4. Mounting of the extension tube to housing side
Push the cables carefully into the extension tube.
Screw the 1“ Extension tube into the screwed piece. Use a 36 mm (1.42“) open-end wrench, do not turn the oscillating rods.
G version: Tighten the fixing screw
Sealing: see 1.2
1=green/ yellow
2=black
3=shield (M)
4=red (R-)
5=white (R+)
Small shrink hose
Fixing screw for G-version
Screwed piece
Assembly VN 5040 / 6040 with d or de-housing
Big shrinking hose
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Level limit switchSeries VN 1000 / 2000 / 5000 / 6000Technical information / Instruction manual
page
Assembly: VN ..020 / ..030 with separate housing
Connection cable
Cable gland
Housing
Connection cable
inner shieldblack
Oscillating piece
redwhite
Plug
Electronic module
The units with separate housing are factory delivered completely assembled.
Should it be required to remove the connection cable from the housing due to shortening the cable or leading the cable through a pipe or wall, observe following items.
Before planning to shorten the cable, check if it is possible to loop the cable between housing and oscillationg piece (prefered solution).
Remove the cable only on the housing side, never on the oscillating piece side.
For reassembling observe following items:
• After cutting the cable, use the factory provided cable situation as a sample.
• Connect the outer shield of the connection cable to the cable gland.
• Obtain right connecting sequence on the plug (see drawing). • Cut present cables, which are not required.
• Isolate the inner shield with an isolation hose to avoid that it may touch any other metal parts.
• Fix the electronic module into the housing with 2 screws. To do this, guide the connecting cable that it rests in the threaded bush and is not clamped between electronic module and housing. Take care, that the plug is not removing from the elecronic module.
The cable gland cable must be closed tightly to reach ingress protection IP67 or NEMA 4.
Remove and reassemble of the connection cable
Threaded bush
min. bending radius of the cable : 50 mm (2")
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Level limit switchSeries VN 1000 / 2000 / 5000 / 6000Technical information / Instruction manual
page
Remove and reassemble of the connection cable
Assembly: VN ..020 / ..030 with separate d- or de- housing
Oscillating piece
inner shieldblack
redwhite
Connection cable
Cable gland
Connection cable
Plug
Tube
Mating plug
Threaded bush
Fixing screws
The units with separate housing are factory delivered completely assembled.
Should it be required to remove the connection cable from the housing due to shortening the cable or leading the cable through a pipe or wall, observe following items.
Before planning to shorten the cable, check if it is possible to loop the cable between housing and oscillationg piece (prefered solution).
Remove the cable only on the housing side, never on the oscillating piece side.
For reassembling observe following items:
• After cutting the cable, use the factory provided cable situation as a sample.
• Connect the outer shield of the connection cable to the cable gland.
• Obtain right connecting sequence on the plug (see drawing). • Cut present cables, which are not required.
• Isolate the inner shield with an isolation hose to avoid that it may touch any other metal parts.
• Connect plug and mating plug.
• Screw the tube into the threaded bush. Before screwing check that Inside the threaded bush a seal ring is present which seals the tube to the threaded bush. While screwing, the cable gland must be open to avoid, that the connection cable is beeing twisted. Take care, that the plug is not removing from the mating plug.
• Fasten the two fixing screws.
The cable gland cable must be closed tightly to reach ingress protection IP67 or NEMA 4.
min. bending radius of the cable : 50mm (2")
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Level limit switchSeries VN 1000 / 2000 / 5000 / 6000Technical information / Instruction manual
page
Disposal
The product consists of materials which can be recycled, details of the used materials see chapter "Technical data - mechanical data". Recycling must be done by a specialised recycling company. Since the product is not subject to the WEEE directive 2002/96/EG, it is not permitted to bring it to a public recycling station.
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